Location: Reykjanes peninsula, road N 42.
Facility: natural geothermal area.
Description: Columns of steam rise skywards, bubbling mud pools play their rhythmical symphony, and the banks around the hot springs are coloured green, yellow and red. The Grænavatn and Gestastaðavatn lakes and the two small pools on each side of the road further south, Augun (Eyes), are all explosion craters created by volcanic eruptions at various times. Grænavatn lake is the largest, some 46 metres deep, with green water due to thermal algae and crystals which absorb the sun. The main geothermal areas in Krýsuvík are Seltún, Hverahvammur, Hverahlíð, Austurengjar, the southern part of Kleifarvatn and Sveifla beneath Hettutindur. The Fúlipollur mud spring is east of the main road.